JPH1080418A - X-ray diagnosing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To normally obtain the proper sense of depth by intnerlocking display change-over and the exchange of right and left images in a stereoscopic fluoroscopy. SOLUTION: This diagnosing device is constituted in such a way that projection is altenately executed by X-rays from two left and right X-ray focuses 5L and 5R, an image by the left X-ray focus 5L is observed by a left eye and the image by the right X-ray focus 5R is by the right eye so that the X-ray image of a testee body is stereoscopically displayed. In this case, a display image changing-over means for inverting the left and the right directions of the displayed image and an image exchanging means for exchanging the left and right images by interlocking to it are provided in configuration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an X-ray diagnostic apparatus, and more particularly to an X-ray diagnostic apparatus capable of displaying a stereoscopic image.

[0002]

2. Description of the Related Art Conventionally, X-rays are alternately emitted from two left and right X-ray focal points, and a left image by a left X-ray focal point is viewed by a left eye.
An X-ray diagnostic apparatus (stereo X-ray fluoroscope) capable of stereoscopically observing an X-ray image of a subject by observing an image at the right X-ray focal point with the right eye.
It has been known. This X-ray diagnostic apparatus is used for grasping the running of complicated blood vessels in the diagnosis of the circulatory system.

Further, there is an image display switching technique as a technique that can match the fluoroscopic image with the observation direction of the observer without changing the arrangement position of the X-ray diagnostic apparatus.

[0005] This is because, for example, by changing the reading order of the image memory, the fluoroscopic image collected as shown in the normal display of FIG. 5 is inverted horizontally as shown in the horizontally inverted display of FIG. 5 upside down as shown in the reverse display, FIG.
This is a technology to display the image upside down and left and right as shown in the inverted display.
The same perspective image as when accessed from the opposite direction can be obtained without changing the arrangement position of the X-ray diagnostic apparatus.

A stereo X-ray fluoroscope 101 as shown in FIG. 6, which is used as a surgical X-ray fluoroscope,
X-ray generator 103 for generating X-rays and X-ray generator 10
X.3 which detects the X-rays generated from 3 and converts it into an optical image
I. FIG. 6 shows a C-arm 107 for holding
As shown in the figure, the subject P is located on the left (L) and right (R) of the X-ray focus.
Even if it is desired to arrange the C-arm 107 in the same direction, there are many cases where the C-arm 107 cannot be arranged in the direction to be observed because of obstructing the operation. In addition, it is known that when performing an operation such as a fracture treatment under stereoscopic fluoroscopy, if the direction of stereoscopic fluoroscopy observed on a monitor does not match the access direction of an operator, workability is significantly reduced. Switching the display is an indispensable technique.

[0006]

However, in a stereo X-ray fluoroscope, it is necessary to collect and display images by aligning the left and right of the perspective image with the left and right of the stereo focus. If this is not performed correctly, that is, if a left-focus image is input to the right eye and a right-focus image is input to the left eye, a phenomenon occurs in which the sense of depth (in the depth direction) is reversed and observed.
Reversing the sense of depth means that the near side is seen in the back and the back is seen in the near side.

On the other hand, there is a case where the relationship between the upper, lower, left, and right of the reference of the X-ray diagnostic apparatus does not coincide with the upper, lower, left, and right that the observer wants to observe from the relation of the arrangement position of the X-ray diagnostic apparatus. In this case, the observer adjusts the upper, lower, left, and right directions of the image to the direction to be observed by the image display switching means. However, in the case of stereoscopic fluoroscopy, simply switching the display is not enough. You have to do that. That is, in the display switching involving the left-right inversion, the sense of depth is reversed unless the left and right images are exchanged.

In the conventional X-ray diagnostic apparatus, display switching involving left / right inversion and switching between left and right images are not linked, and are provided as separate functions. Therefore, in spite of performing the display switching with the left-right inversion, it is conceivable that the operator forgets to exchange the left and right images and observes in a state where the sense of depth is reversed. However, there was a possibility that the operation would be hindered.

An object of the present invention is to provide an X-ray diagnostic apparatus capable of always giving a proper sense of depth by interlocking display switching and left / right image switching in stereoscopic fluoroscopy. The purpose is to provide.

[0010]

According to a first aspect of the present invention, an X-ray is alternately emitted from two left and right X-ray focal points, and a left image by the left X-ray focal point is left-eyed. A display image switching means for inverting the left and right directions of the displayed image in an X-ray diagnostic apparatus for displaying an X-ray image of the subject three-dimensionally by observing an image at the right X-ray focal point with the right eye; When the display image switching means reverses the left-right direction, the display image switching means has an image exchange means for exchanging the left and right images in conjunction therewith.

In the X-ray diagnostic apparatus according to the first aspect,
When the left and right directions of the display image are reversed by the display image switching means, the left and right images are switched by the image replacement means in conjunction with this. Thereby, it is possible to always have an appropriate depth feeling.

According to a second aspect of the present invention, X-rays are alternately emitted from two left and right X-ray focal points, and a left image with a left X-ray focal point is imaged by a left eye, and an image with a right X-ray focal point is imaged. In an X-ray diagnostic apparatus that stereoscopically displays an X-ray image of a subject by observing with the right eye, a display changeover switch that issues an instruction to invert the displayed image horizontally, vertically, and vertically and horizontally, Display image switching means for inverting the left and right directions of the displayed image when the display switching switch instructs the image to be horizontally or vertically and horizontally, and the left and right directions of the image displayed by the display image switching means In the case where is inverted, the gist of the present invention is to include an image switching unit that switches the images input to the left eye and the right eye in conjunction with this.

[0013] In the X-ray diagnostic apparatus according to the second aspect,
When the display switch is instructed to flip the image to be displayed horizontally, vertically, or vertically and horizontally, the direction of the displayed image is displayed when the image is flipped horizontally or vertically and horizontally. The image is switched by the image switching unit, and the images to be input to the left eye and the right eye are switched by the image switching unit in conjunction with the inversion. Thereby, it is possible to always have an appropriate depth feeling.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the X-ray diagnostic apparatus according to the present invention.

As shown in FIG. 1, an X-ray diagnostic apparatus 1 of this embodiment comprises an X-ray control means 3, an X-ray generator 5, an image intensifier (II) 7, an optical system 9 and
A camera 11, an analog / digital (A / D) converter 13, and write switches 15a, 15b, 1
5c and image memories 17La, 17Lb, 17Ra, 1
7Rb, display changeover switch 19, CPU 21
An image memory readout control unit 23 as a display image changeover unit, and readout changeover switches 25a and 25
b, 25c, a digital / analog (D / A) conversion unit 27, an image monitor 29, a shutter timing control unit 31 as an image replacement unit, and a liquid crystal polarization shutter 3.
And 3.

The X-ray control means 3 controls the left and right X-ray focal points 5 of the X-ray generation unit 5 under the X-ray conditions specified by the CPU 21.
X-rays are generated alternately from L and 5R.

The X-ray generator 5 has left and right X-ray focal points 5L, 5L.
R is provided, and X-rays are generated alternately from left and right X-ray focal points 5L and 5R according to a command from the X-ray control means 3.

I. I. Numeral 7 converts the X-rays generated from the X-ray generator 5 and having passed through the subject P into an optical image.

The optical system 9 has an I.P. I. Focus the camera 1 so that the optical image converted by the camera 7 can be captured by the camera 11.
One imaging area.

The camera 11 captures an optical image focused by the optical system 9 and converts it into a video signal.

The A / D converter 13 converts a video signal, which is an analog signal converted by the camera 11, into a digital signal.

Write switch 15a, 15
Reference numerals b and 15c denote a predetermined image memory 1 in accordance with an instruction from a write switch control unit (not shown) for converting the video signal converted into a digital signal by the A / D conversion unit 13 into a predetermined signal.
Switching is performed so as to write to 7La, 17Lb, 17Ra, and 17Rb.

The image memory 17 includes two image memories 17La and 17Lb for the left image and an image memory 1 for the right image.
The video signal, which is composed of 7Ra and 17Rb and converted into a digital signal by the A / D converter 13, is recorded separately into a left image and a right image.

The display changeover switch 19 includes a normal display switch, a left-right reversal switch, a vertical reversal switch, and a vertical reversal switch, and a normal display command and a left-right reversal display corresponding to the switches turned on by the operator. A command, a vertically inverted display instruction, and a vertically inverted left and right inverted display instruction are output to the CPU 21. Note that the display changeover switch 19 is normally a normal display switch.

The CPU 21 outputs a write switch control signal to a write switch controller (not shown) to divide the video signal into a left image and a right image.
Corresponding image memories 17La, 17Lb, 17Ra, 1
Write switch 1 so that recording is performed at 7Rb
5a, 15b and 15c are switched.

The CPU 21 outputs a recording control signal to an image memory write control unit (not shown) to divide the video signal into a left image and a right image,
7La, 17Lb, 17Ra, and 17Rb are recorded.

Further, the CPU 21 outputs a read-out switch control signal to a read-out switch control unit (not shown) to convert the video signals of the left image and the right image into image memories 17La, 17Lb, 17R in a predetermined order.
The read changeover switches 25, 25b, and 25c are changed over so as to read out from a and 17Rb.

Further, the CPU 21 issues a normal display command, a left-right inverted display command,
When the upside down display command and the upside down display command are output, the image memory read control unit 23 outputs a display control signal corresponding to the command to change the order of the addresses when the video signal is read. At the same time, it outputs a shutter timing control signal to the shutter timing control unit 31 to switch the timing of the polarization direction of the liquid crystal polarization shutter 33.

The image memory read control unit 23 has a CPU
When a display control signal is output from 21, the video signal is read from the image memories 17La, 17Lb, 17Ra, and 17Rb by changing the order of addresses in accordance with the control signal.

Read changeover switches 25a, 25
b and 25c store predetermined image memories 17La and 1 according to an instruction from a read-out switch control unit (not shown).
Switching is performed to connect the 7Lb, 17Ra, 17Rb and the D / A converter 27.

The D / A converter 27 is provided with an image memory 17L
a, 17Lb, 17Ra, and 17Rb are converted into analog signals.

The image monitor 29 displays the video signal converted into an analog signal by the D / A converter 27 on the monitor.

The shutter timing control unit 31 has a CPU
In the case of normal display and upside down display, the video signal of the left image is the left eye, the video signal of the right image is right eye, the upside down display and upside down display The polarization direction of the liquid crystal changing shutter 33 is controlled so that the video signal of the left image enters the right eye and the video signal of the right image enters the left eye.

The liquid crystal polarizing shutter 33 responds to a command from the shutter timing control unit 31. When a video signal is input to the left eye, the liquid crystal polarizing shutter 33 is adjusted to the changing direction of the left eye of the polarizing glasses 35 worn by the observer D. When the video signal is input to the right eye, the polarization direction of the polarizing glasses 35 is adjusted to the polarization direction of the right eye.

Next, the operation of the X-ray diagnostic apparatus 1 of the present embodiment will be described with reference to FIGS. First, as shown in FIGS. 3 (a) and 3 (b), the subject P is connected to the X-ray generator 5 and the I.D. I.
7 and the X-ray diagnostic apparatus 1 starts stereo fluoroscopy. At this time, the display changeover switch 19 is
The normal display switch is turned on.

When the stereo fluoroscopy is started, the X-rays generated by the X-ray generator 5 are transmitted to the I.D. I. The focus is converted into an optical image by the optical system 9 so that the camera 11 can capture an image.
The camera 11 converts the optical image into a video signal.

On the other hand, when stereo fluoroscopy is started, the CPU
Reference numeral 21 outputs a write switch control signal to a write switch control unit (not shown) and a recording control signal to an image memory write control unit (not shown). Thereby, the image memory write control unit (not shown) divides the video signal converted into the digital signal into a left image and a right image and records the divided signals in the corresponding image memories 17La, 17Lb, 17Ra, and 17Rb.

Next, the CPU 21 outputs a read-out switch control signal to a read-out switch control unit (not shown) and outputs a display control signal to the image memory read-out control unit 23. Thereby, the image memory read control unit 23 converts the video signal into the image memories 17La and 17La in accordance with the display control signal.
Read from Lb, 17Ra, 17Rb.

The read video signal is converted into an analog signal by the D / A converter 27 and displayed on the image monitor 29. At this time, as shown in the normal display of FIG. 4, the image with the left X-ray focus 5L is displayed as a left-eye image, and the image with the right X-ray focus 5R is displayed as a right-eye image.

At this time, the CPU 21 outputs a shutter timing control signal to the shutter timing control unit 31. Thereby, the liquid crystal polarization shutter 33 is
The timing of the polarization direction is controlled according to the shutter timing control signal. Thereby, the observer D looks at the image monitor 29 through the polarizing glasses 35,
The perspective image of the subject P can be observed three-dimensionally.

In this state, the left / right inversion switch or the up / down / left / right inversion switch of the display changeover switch 19 is turned on.
Display switch 19 is set to the CPU 21
In response to the switch, a horizontal reversal display command or a vertical reversal display command is output. This allows
The CPU 21 instructs the image memory read control unit 23 to
A display control signal corresponding to the left / right inverted display or the up / down / left / right inverted display is output, and the order of the addresses at the time of reading the video signal is changed so as to correspond to the left / right inverted display or the up / down / left / right inverted display. At this time, as shown in the vertical and horizontal reversal display of FIG. 4, the image with the left X-ray focus 5L is displayed as a right-eye image, and the image with the right X-ray focus 5R is displayed as a left-eye image.

Here, if the shutter timing of the normal display is maintained, the image by the left X-ray focal point 5L is displayed as a right-eye image, and the image by the right X-ray focal point 5R is displayed as a left-eye image. Regardless, the image by the left X-ray focal point 5L enters the left eye, and the image by the right X-ray focal point 5R enters the right eye. Therefore, CPU2
1 outputs a shutter timing control signal corresponding to the left / right inverted display or the up / down / left / right inverted display to the shutter timing control unit 31 to switch the timing of the polarization direction of the liquid crystal polarization shutter 33.

In this manner, in response to the operation of the display changeover switch 19, the timing of the change direction of the liquid crystal change shutter 33 is changed so as to correspond to the left / right inverted display or the up / down / left / right inverted display, and the video signal is read out. Address order is changed.

For example, as shown in FIG.
X-rays are generated from the left X-ray focal point 5L between time t2 and time t2.
X-rays are generated alternately left and right, such as generating X-rays from the right X-ray focal point 5R during t3. Here, first, the video signal obtained by the X-ray generated from the left X-ray focal point 5L between the times t1 and t2 is written to the image memory 17La between the times t2 and t3, and the right side between the times t2 and t3. X
The video signal obtained by the X-rays generated from the line focus 5R is written to the image memory 17Ra between the times t3 and t4. Next, the video signal obtained from the X-rays generated from the left X-ray focal point 5L during the time t3 to t4 is the time t4.
Is written to the image memory 17Lb during the period from to t5. Next, the video signal obtained from the X-rays generated from the right X-ray focal point 5R at times t4 to t5 is written to the image memory 17Rb between times t5 and t6. Thereafter, the write operation is similarly continued.

On the other hand, between time t2 and t3, the image memory 17
The video signal written to La is read between times t3 and t6, and the video signal written to image memory 17Ra between times t3 and t4 is read between times t4 and t7. Further, the image memory 17Lb is provided between the time t4 and the time t5.
Is read between times t5 and t8, and the video signal written to the image memory 17Rb between times t5 and t6 is read between times t6 and t9. Thereafter, the read operation is similarly continued.

The read control switches 25a, 25
b and 25c indicate that the image memory 17La is used between times t4 and t5.
Between the time t5 and the time t6, the image memory 17Ra side and the time t
The image memory 17Lb is switched to the image memory 17Rb from 6 to t7, and the image memory 17Rb is switched from time t7 to t8. Thereafter, the switch operation is similarly continued.

Further, the shutter timing control section 31
The polarization direction in which the liquid crystal polarization shutter 33 enters the image from the left eye during the time t4 to t5, and the polarization direction in which the image enters the liquid crystal polarization shutter 33 from the right eye during the time t5 to t6. Thereafter, the same operation is continued until the left / right inversion switch or the up / down / left / right inversion switch of the display changeover switch 19 is turned on. Thereby, the video signal of the left image is input to the left eye, and the video signal of the right image is input to the right eye.

In this state, if the up / down / left / right inversion switch of the display changeover switch 19 is turned on between time t9 and t10, the liquid crystal polarization shutter 33 normally operates at the time t10 and time 11 so that the liquid crystal polarization shutter 33 enters the image from the left eye. However, the direction is changed to the polarization direction in which an image is input from the right eye. Thereafter, an image is alternately input to the left eye and the right eye. Thereby, at time t1
After 0, the video signal of the left image is input to the right eye, and the video signal of the right image is input to the left eye. In addition, after time t10, the order of the addresses at the time of reading the video signal is changed so as to correspond to the vertical and horizontal reversed display.

When the up / down / left / right inversion switch of the display changeover switch 19 is turned on in this way, the timing of the change direction of the liquid crystal change shutter 33 is changed so as to correspond to the up / down / left / right inversion display, and the address for reading the video signal is changed. Is changed.

As described above, the X-ray diagnostic apparatus 1 of the present embodiment
When the left / right inversion switch or the up / down / left / right inversion switch of the display changeover switch 19 is turned on, the timing of the change direction of the liquid crystal change shutter 33 is changed so as to correspond to the left / right inversion display or the up / down / left / right inversion display. At the same time, the order of the addresses at the time of reading the video signal is changed, so that it is possible to always have an appropriate depth feeling quickly.

In this embodiment, the liquid crystal polarizing shutter 3 is used.
3 and the polarization glasses 35 are used to change the polarization direction, thereby controlling the image input of the left eye and the right eye. However, the present invention is not limited to this. The present invention can also be applied to a case in which the image input to the left eye and the right eye is controlled by blocking the image input to the left eye or the right eye using the glasses.

[0052]

As described above, according to the first and second aspects of the present invention, when the left and right directions of the displayed image are reversed, the left and right images are interchanged in conjunction with this. Therefore, it is possible to always quickly give an appropriate sense of depth.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an X-ray diagnostic apparatus according to the present invention.

FIG. 2 is a timing chart showing operation timings of the X-ray diagnostic apparatus shown in FIG.

FIG. 3 is a diagram showing a use situation of the X-ray diagnostic apparatus shown in FIG.

FIG. 4 is a diagram showing an example of switching between normal display and up / down / left / right inverted display by an image obtained in the use situation shown in FIG. 3;

FIG. 5: Display switching (normal display, left / right inverted display,
FIG. 7 is a diagram for explaining vertical and inverted display and vertical and horizontal inverted display.

FIG. 6 is a diagram illustrating an example of directionality (up, down, left, and right) when a stereo fluoroscope is arranged.

[Explanation of symbols]

 1 X-ray diagnostic apparatus 3 X-ray control means 5 X-ray generator 7 I. I. 9 Optical system 11 Camera 13 A / D converter 15a, 15b, 15c Write switch 17La, 17Lb, 17Ra, 17Rb Image memory 19 Display switch 21 CPU 23 Image memory read controller 25a, 25b, 25c Read switch 27D / A conversion unit 29 Image monitor 31 Shutter timing control unit 33 Liquid crystal polarization shutter 35 Polarized glasses P Subject D Observer

Claims (2)

[Claims] An X-ray is alternately irradiated from two left and right X-ray focal points, and a left image by a left X-ray focal point is observed by a left eye, and an image by a right X-ray focal point is observed by a right eye. Sample X
In an X-ray diagnostic apparatus for displaying a line image three-dimensionally, a display image switching means for inverting the left-right direction of an image to be displayed, and in a case where the left-right direction is inverted by the display image switching means, An X-ray diagnostic apparatus, comprising: an image exchange unit for exchanging left and right images. 2. An X-ray is irradiated alternately from two left and right X-ray focal points, and a left image by the left X-ray focal point is observed by the left eye, and an image by the right X-ray focal point is observed by the right eye. Sample X
In an X-ray diagnostic apparatus for displaying a line image three-dimensionally, a display changeover switch for giving an instruction to invert the displayed image horizontally, vertically, or vertically and horizontally, and the image is horizontally or vertically inverted by the display changeover switch. Display image switching means for inverting the left and right direction of the displayed image when instructed to invert left and right; and interlocking with this when the left and right direction of the image displayed by this display image switching means is inverted. An X-ray diagnostic apparatus, comprising: an image exchange unit that exchanges images input to the left eye and the right eye.